(19)
(11) EP 2 555 482 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.10.2015 Bulletin 2015/42

(43) Date of publication A2:
06.02.2013 Bulletin 2013/06

(21) Application number: 12178384.9

(22) Date of filing: 27.07.2012
(51) International Patent Classification (IPC): 
H04L 25/03(2006.01)
H04B 7/04(2006.01)
 H04L 25/02(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 02.08.2011 CN 201110219394

(71) Applicant: Telefonaktiebolaget L M Ericsson (publ)
164 83 Stockholm (SE)

(72) Inventors:
  • Liu, Jinhua
    100102 Chaoyang District (CN)
  • Miao, Qingyu
    100012 Chaoyang District (CN)
  • Larsson, Erik
    SE-753 22 Uppsala (SE)
  • Cedergren, Andreas
    SE-237 32 Bjärred (SE)

(74) Representative: Lind, Robert 
Marks & Clerk LLP Fletcher House Heatley Road The Oxford Science Park
Oxford OX4 4GE
Oxford OX4 4GE (GB)

   


(54) Method and device for decoding of precoded signal


(57) The present invention provides a method and a device for decoding of precoded signals in a wireless communication system and network node or terminal associated therewith. The wireless communication system comprises a sender and a receiver, said sender and said receiver share a codebook containing a plurality of precoding matrixes, and said sender precodes at least a data signal to be transmitted with one of the plurality of precoding matrixes. Said method comprising receiving signals from the sender, estimating a channel between the sender and the receiver based on a part of received signals that is known a prior, evaluating relevancies of precoding matrixes in said codebook to a precoded signal in the received signals based on at least the estimated channel and the codebook according to a predetermined criterion, and selecting a precoding matrix with the maximum relevancy by comparing the evaluated relevancies, and applying the selected precoding matrix for decoding of the received precoded signal. The present invention enables to avoid degradation of precoding performance due to precoding information transmission error.







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